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Issue #617

August 6, 2025

Creating a Scroll-Spy With 2 Lines of CSS

Creating a Scroll-Spy With 2 Lines of CSS

Una Kravets explains how scroll-target-group lets you create a scroll-spy table of contents with basically two lines of CSS.

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Infinite Marquee Animation using Modern CSS

Infinite Marquee Animation using Modern CSS

Temani Afif demonstrates how to use modern CSS to build a row of logos that animate forever perfectly and don’t have any duplicated HTML or JavaScript at all.

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CSS Weekly on YouTube

▶ Frontend News #15: Transform Order Matters, Creative Drop Caps, Frontend Developer Quiz

▶ Frontend News #15: Transform Order Matters, Creative Drop Caps, Frontend Developer Quiz

Find out why the order in which you set values for the CSS transform property really matters, now how to easily create drop caps using modern CSS, if you really are a frontend developer, and more.

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Articles & Tutorials

▶ Quick & Easy Theme Transitions

Kevin Powell shows how to spice up your site with quick & easy theme transitions.

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Designing for User Font-size and Zoom

Miriam Suzanne explores different ways to interact with a user’s preferred font size using modern CSS units and math functions.

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The CSS if() function: Conditional styling will never be the same

Ikeh Akinyemi investigates how the if() function works, shares some practical examples, and compares it to existing CSS conditional techniques.

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Web Components: Working With Shadow DOM

Russell Beswick demonstrates how Shadow DOM fits into the broader picture of Web Components, explaining why it matters, when to use it, and how to apply it effectively.

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Building Extensible Frontend Systems

Chris Ferdinandi shares some tips on building frontend systems—design systems, UI libraries, and so on—that can be easily extended for use cases and situations you didn’t plan for.

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Tools

CSS Carousel Gallery

Adam Argyle created a fantastic collection of CSS-only carousel demos that showcases the capabilities and potential of CSS Carousel specs

Check it out

Frontend Performance Checklist

A comprehensive, platform-agnostic checklist that enumerates key front‑end best practices and optimizations for maximizing website speed and efficiency.

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Inspiration

Colored, Glowing Edge Card

Colored, Glowing Edge Card

Simon Goellner created a stunning and effective glowing card demo you should definitely check out.

Get inspired

Until Next Week

Thank you so much for reading!

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Happy coding,
Zoran Jambor

Issue #616

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CSS Weekly is curated, edited,
published and created by Zoran Jambor.